fable-core

fable-core

Fable core lib & bindings for native JS objects, browser and node APIs

Installation

$ npm install --save fable-core

Usage

The default file when you import fable-core uses universal modules (UMD) which can be understood by node (commonjs) or require.js (amd). There's also a minified version fable-core.min.js, and if you need the library in other module formats you can import fable-core/es2015 or fable-core/commonjs instead.

In a F# project (.fsproj)

  <ItemGroup>
    <Reference Include="node_modules/fable-core/Fable.Core.dll" />
  </ItemGroup>

In a F# script (.fsx)

#r "node_modules/fable-core/Fable.Core.dll"

open Fable.Core
open Fable.Import

require.js

When targeting the browser and using AMD instead of a module bundler, you can load Fable's core lib with require.js as follows:

<script src="node_modules/requirejs/require.js"></script>
<script>
requirejs.config({
    // Set the baseUrl to the path of the compiled JS code
    baseUrl: 'out',
    paths: {
        // Explicit path to core lib (relative to baseUrl, omit .js)
        'fable-core': '../node_modules/fable-core/fable-core.min'
    }
});
// Load the entry file of the app (use array, omit .js)
requirejs(["app"]);
</script>

Development

The source is written in TypeScript. The use of a TypeScript-aware editor (like VSCode or ALM) is highly recommended.

Output files are generated as shown below:

• fable-core.ts (source)
  • es2015.js (Created from fable-core.ts |> tsc --target ES2015)
    • fable-core.js (Created from es2015.js |> babel --plugins ...umd)
      • fable-core.min.js (Created from fable-core.js |> uglifyjs)
    • commonjs.js (Created from es2015.js |> babel --plugins ...commonjs)

To build

Simply run

build fablecore

from Fable root project folder.